Charges have been dropped against a Falmouth, Massachusetts teenager who had been accused of threatening to shoot up a school on Cape Cod, the Cape and Islands District Attorney confirmed Thursday.

The 18-year-old was arrested two weeks ago for allegedly threatening a school shooting. He appeared in court last week, where he was released on $2,500 bail and ordered to wear a GPS monitoring device and remain under house arrest, angering parents who were concerned for their children's safety.

Charges dropped against Falmouth teen

According to the DA, investigators learned of a discrepancy which "made further prosecution in the district court no longer available." There was no further explanation of the "discrepancy." The charge of threatening to use a deadly weapon in a public building has been dropped by the DA, who also said the investigation continues.

Falmouth parents concerned

Parents said they're concerned and confused why prosecutors dropped the charges.

"It's extremely terrifying knowing that he's out on the streets without any kind of monitoring whatsoever," said Falmouth parent Dianna Wilson. "If this individual thinks this was a horrible experience for them, I would say that that attorney and that family need to think about all the parents and children in this town."

"It's not fair and it's not right," said another Falmouth parent. "I'm concerned about moving forward. When you look around at all the other pieces, there's still so much more to look at and make me believe that this individual is still a credible threat to our schools and to our children."

Security increased at Falmouth and Mashpee schools

A letter was sent to Falmouth Public Schools staff and families Thursday saying there will be no outdoor recess or activities Friday and there will be an increased police presence at the school. There was no outdoor recess or activities Thursday either. Falmouth schools did not directly link this to the dismissed charges.

After learning the charges were dropped, Mashpee Public Schools contacted staff and families, saying it will also have more police officers at their schools.

"We will continue to deploy enhanced safety measures at Falmouth Schools. The Falmouth Police Department wants to reassure the public that we will continue to do everything within our ability to ensure safety of our schools and our community," said the Falmouth Police Department in a statement.

According to court documents, last month mental health counselors told investigators the teen had talked about wanting to shoot up a school and claimed he was refurbishing guns in his room. While police said they found no illegal weapons in his home, they did find a 3-D printer large enough to make a weapon. Police said they also found photos and a journal referencing the 1999 Columbine High School shooting.

Statement from teen's lawyer

"There has been significant exaggeration of the facts and evidence across social media that have resulted in unfair accusations against not only my client but also the judicial system, the local school board, and local legislatures. My client has maintained his innocence since the beginning of this investigation and asks now that he and his family are allowed to return to their normal lives," said attorney Krysten Condon, in part, in a statement.

Parents were concerned after police said the teen was allegedly spotted casing Teaticket Elementary School and Mashpee High School. However, Condon said there is no credible evidence against her client and police have been looking at the wrong person, saying his parents are also concerned the real suspect is out there.

"This person is still at large and the parents hope that the Falmouth Police will continue to investigate the actual individual who was on school property," said Condon in a statement.